…or the lack thereof.
I know this topic reaches across all genres. Here’s what I have so far:
And I know there are thousands others that are eluding me.
Care to contribute?
“Behind The Wall Of Sleep” – Smithereens
“I Don’t Sleep, I Dream” – R.E.M.
“Daysleeper” – R.E.M.
I wonder, I wonder, I wonder,
I wonder how I look when I’m asleep?
I wonder, I wonder, I wonder,
How do I look when I’m done counting sheep?
Please tell me, Please tell me, Please tell me,
I promise that the secret I will keep!
I think I’ll spend the day
In Phil-a-del-phi-a,
And find out how I look when I’m asleep!
Gilbert & sullivan’s Nightmare Song
“Welcome To My Nightmare”
“Caught in A Dream”
“The Awakening”
“Didn’t We Meet?”
“Wake me Gently”
“Lullaby”
“Respect For The Sleepers”
“Can’t Sleep. Clowns Will Eat Me!”
All by Alice Cooper.
(What? There are other bands?! Naw, you must be kidding! )
DREAMWEAVER people… 
Geez.
“Silent Lucidity” by Queensryche
“Enter Sandman” by Metallica
I’m Only Sleeping - The Beatles
How Do You Sleep - John Lennon
Sleeping in a Jar - Frank Zappa
If Only Tonight We Could Sleep - The Cure
Sleep Keeps Me Awake - Michelle Shocked
I’ll Sleep When I’m Dead - Warren Zevon
I Go To Sleep - Pretenders
Sleeping in the Flowers - They Might Be Giants
I Only Sleep With Strangers - Aztec Two Step
(Last Night) I Didn’t Get To Sleep At All - The 5th Dimension
“When You Dream” (Barenaked Ladies)
Somebody’s Been Sleeping by 100 Proof Aged In Soul
Lion Sleeps Tonight by the Tokens
Don’t Sleep in the Subway by Petula Clark
Sleep Comes Down - Psychedelic Furs
Er…and several thousand lullabies?
Sleeping In–The Postal Service
Who Needs Sleep? (Barenaked Ladies)
“I’m So Tired” – The Beatles
“Sound-a-Sleep” - Blondie
“And Dream of Sleep” - Kate Bush
“Dreaming While You Sleep” - Genesis
“Sleeping With the Television On” - Billy Joel
“Talking in Your Sleep” - The Romantics
“Talking in Your Sleep” - Crystal Gayle (different song)
“You Can’t Walk in Your Sleep (if you can’t sleep)” - The Go-Go’s
“Saint Judy’s Comet”–Paul Simon
Grandaddy’s Levitz: “Oh to sleep, perchance to dream… to live again those joyous scenes…”
Sparklehorse mentions sleep in a lot of his/their songs:
“he’s been known to sleep on piles of dry leaves
abandoned on October lawns
sometimes he awakens with spiders on his eyelids” from Rainmaker
“I woke up in
a burnt out basement
sleeping with
metal hands
in a spirit ditch” from Spirit Ditch
“my bones wish to escape
and run along an alien expanse
to collaspe from the heat
in a cartoonish heap
to sleep oh to sleep” (the entire lyrics of Box of Stars (part one)
“now in perfect peace I rest/now I lay me down to sleep
in full salvation blest/I pray my soul to keep
for thy grace that keeps me still/if I die before I wake
safe from every ill/I pray my soul to take” from Come On In
etc. etc. etc., and they’re all great songs to boot.
(The song Spirit Ditch includes a phone message, ostensibly from the artist’s mother, describing a dream she had about him and telling him to be careful. It’s really cool.)
“Talking In Your Sleep” (Crystal Gayle?)
Dream Lover, by Bobby Darin